docs: def select(self, *cluster_ids):
          """Select a list of clusters."""
          # HACK: allow for `select(1, 2, 3)` in addition to `select([1, 2, 3])`
          # This makes it more convenient to select multiple clusters with
          # the snippet: `:c 1 2 3` instead of `:c 1,2,3`.
          if cluster_ids and isinstance(cluster_ids[0], (tuple, list)):
              cluster_ids = list(cluster_ids[0]) + list(cluster_ids[1:])
          # Remove non-existing clusters from the selection.
          cluster_ids = self._keep_existing_clusters(cluster_ids)
          # Update the cluster view selection.
          self.cluster_view.select(cluster_ids)